K Reactor
E100464
K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
All labels observed (1)
| Label | Occurrences |
|---|---|
| K Reactor canonical | 4 |
How this entity was disambiguated
This entity first appeared as the object of triple T842139 — resolving that mention is where its identity was fixed. The disambiguator weighed these candidate entities and picked the highlighted one (or “None”, minting a new entity). This is how homonymy is resolved: the same surface form can point to different entities.
NED1
Entity disambiguation (via context triple)
gpt-5-mini-2025-08-07
Target entity: K Reactor Context triple: [Savannah River Site, formerFacility, K Reactor]
-
A.
D Reactor
D Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
-
B.
K-West Reactor
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
-
C.
K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
-
D.
X-10 graphite reactor
The X-10 graphite reactor was an early nuclear reactor at Oak Ridge, Tennessee, built during the Manhattan Project as a pilot plant for plutonium production and a key step toward the development of nuclear weapons and nuclear energy.
-
E.
N Reactor
N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
- F. None of above. chosen
- G. Unsure - the case is ambiguous/there is not enough information to decide.
NED2
Entity disambiguation (via description)
gpt-5-mini-2025-08-07
Target entity: K Reactor Target entity description: K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
-
A.
D Reactor
D Reactor was one of the early plutonium production reactors at the Hanford Site in Washington, built during the Manhattan Project to support the U.S. nuclear weapons program.
-
B.
K-West Reactor
K-West Reactor is one of the plutonium production reactors at the Hanford Site in Washington State, historically used to support the U.S. nuclear weapons program.
-
C.
K-East Reactor
K-East Reactor was one of the plutonium production reactors at the Hanford Site in Washington State, built during the Cold War to support the U.S. nuclear weapons program.
-
D.
X-10 graphite reactor
The X-10 graphite reactor was an early nuclear reactor at Oak Ridge, Tennessee, built during the Manhattan Project as a pilot plant for plutonium production and a key step toward the development of nuclear weapons and nuclear energy.
-
E.
N Reactor
N Reactor was a dual-purpose plutonium production and power-generating nuclear reactor at the Hanford Site in Washington, notable for its graphite-moderated, water-cooled design and role in the U.S. Cold War weapons program.
- F. None of above. chosen
Statements (48)
| Predicate | Object |
|---|---|
| instanceOf |
nuclear production reactor
ⓘ
plutonium production reactor ⓘ weapons-grade materials production facility ⓘ |
| associatedProgram | U.S. nuclear weapons program ⓘ |
| associatedWith |
Cold War
ⓘ
nuclear nonproliferation concerns ⓘ |
| builtFor |
United States Atomic Energy Commission
ⓘ
surface form:
U.S. Atomic Energy Commission
|
| constructedFor | production of weapons-grade nuclear materials ⓘ |
| coolant | heavy water ⓘ |
| country |
United States of America
ⓘ
surface form:
United States
|
| currentUse |
monitoring and surveillance only
ⓘ
no power production ⓘ |
| decommissioningStatus | under long-term decommissioning and surveillance ⓘ |
| designedFor | high neutron flux production ⓘ |
| environmentalProgram | Savannah River Site cleanup program ⓘ |
| fuelType | uranium ⓘ |
| hasFunction | production of special nuclear materials ⓘ |
| hasInfrastructure |
cooling systems
ⓘ
fuel handling systems ⓘ radiation shielding structures ⓘ reactor building ⓘ |
| hazardType | radioactive materials ⓘ |
| historicalPeriod | Cold War era ⓘ |
| locatedIn |
Aiken County, South Carolina
ⓘ
Barnwell County, South Carolina ⓘ Savannah River Site ⓘ South Carolina ⓘ United States of America ⓘ
surface form:
United States
|
| locatedNear | Savannah River ⓘ |
| locatedOn | federal reservation ⓘ |
| managedBy | U.S. Department of Energy ⓘ |
| nearCity |
Aiken, South Carolina
ⓘ
Augusta, Georgia ⓘ |
| nearFacility | other Savannah River Site reactors ⓘ |
| ownedBy |
United States government
ⓘ
surface form:
U.S. government
|
| partOf |
Savannah River Site
ⓘ
surface form:
Savannah River Site reactor complex
U.S. Cold War nuclear complex ⓘ U.S. nuclear weapons infrastructure ⓘ |
| primaryUse |
production of tritium
ⓘ
production of weapons-grade plutonium ⓘ |
| purpose | support of U.S. nuclear weapons program ⓘ |
| reactorType | heavy water moderated reactor ⓘ |
| regulatoryAuthority |
Office of Environmental Management
ⓘ
surface form:
U.S. Department of Energy Office of Environmental Management
|
| riskCategory | former defense nuclear facility ⓘ |
| safetyConcern | radioactive contamination risk ⓘ |
| safetyStatus | permanently shut down ⓘ |
| siteOperator | U.S. Department of Energy ⓘ |
| status | decommissioned ⓘ |
How these facts were elicited
The pipeline generated the facts above by prompting gpt-5.1 with this entity's name + description and the instruction below.
Instruction
You are a knowledge base construction expert. Given a subject entity and a description of it, return factual statements that you know for the subject as a JSON list of dictionaries(triples), where keys must be "subject", "predicate" and "object". The number of facts may be very high, between 25 to 50 or more, for very popular subjects. For less popular subjects, the number of facts can be very low, like 5 or 10. # Requirements - If you don't know the subject at all, return an empty list. - If the subject is not a named entity, return an empty list. - Include at least one triple where predicate is "instanceOf". - Do not get too wordy. - Separate several objects into multiple triples with one object.
Input
Subject: K Reactor Description of subject: K Reactor is a decommissioned nuclear production reactor at the Savannah River Site in South Carolina that was used primarily for producing weapons-grade materials during the Cold War.
Referenced by (4)
Full triples — surface form annotated when it differs from this entity's canonical label.